linux-kernel - Re: [linux-pm] [PATCH] [suspend] pci_raw_set_power_state: replace msleep by udelay in resuming procedure

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Date:	Wed, 22 Jul 2009 09:10:39 +0200
From:	Pavel Machek <pavel@....cz>
To:	Wu Zhangjin <wuzhangjin@...il.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-pm@...ts.linux-foundation.org, len.brown@...el.com,
	yanh@...ote.com, linux-kernel@...r.kernel.org, zhangfx@...ote.com
Subject: Re: [linux-pm] [PATCH] [suspend] pci_raw_set_power_state: replace
	msleep by udelay in resuming procedure


> > Perhaps it's necessary to annotate your timer interrupts appropriately so that
> > they are not disabled during suspend?
> 
> Thanks very much, The IRQF_TIMER flag works for me, so the replacement
> of msleep by udelay is not needed.
> 
> [This source code is not ready to upstream, herein, just a prompt to the
> other guys who will meet the same problem.]

Unlike the other patch, this one actually looks ok.

> Adding IRQF_TIMER to the interupt flags when requesting the mfgpt timer
> interrupts solves the problem.
> 
> Signed-off-by: Wu Zhangjin <wuzhangjin@...il.com>
> ---
>  arch/mips/loongson/common/cs5536/cs5536_mfgpt.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
> b/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
> index 1a518ec..5b8fa9f 100644
> --- a/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
> +++ b/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
> @@ -133,7 +133,7 @@ static irqreturn_t timer_interrupt(int irq, void
> *dev_id)
>  
>  static struct irqaction irq5 = {
>  	.handler = timer_interrupt,
> -	.flags = IRQF_DISABLED | IRQF_NOBALANCING,
> +	.flags = IRQF_TIMER | IRQF_DISABLED | IRQF_NOBALANCING,
>  	.name = "timer"
>  };


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